That number includes nine children and ten adults. So far, four people have been hospitalized.

The outbreaks happened in Inwood Hill Park, Washington Heights and Hudson Heights in Manhattan and in the Melrose and Mount Hope neighborhoods in the Bronx.

Measles is a very contagious viral infection. Symptoms typically include a rash and high fever along with a cough, red eyes and runny nose and usually lasts five to six days, according to health officials.

The illness usually begins with a rash on the face and then moves down the body and may include the palms of the hands and soles of the feet.

Health officials said they are working with hospitals to prevent exposure in emergency rooms and are urging New Yorkers to make sure all household members, including young children, are vaccinated.